Adjustable step exerciser



FIG. 1 is a side elevational view of an adjustable step exercisershowing my new design, the side opposite being substantially a mirrorimage;

FIG. 2 is a top plan view thereof;

FIG. 3 is an end elevational view thereof, the end opposite beingsubstantially a mirror image; and

FIG. 4 is a bottom plan view thereof.

The ornamental design for an adjustable step exerciser, as shown anddescribed.